login.aspx.cs

c#网络编程及应用-刘瑞新

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

namespace WebApplication
{
	/// <summary>
	/// login 的摘要说明。
	/// </summary>
	public class login : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.Label Label2;
		protected System.Web.UI.WebControls.Label Label3;
		protected System.Web.UI.WebControls.Label Label4;
		protected System.Web.UI.WebControls.RadioButtonList RadioButtonList1;
		protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator1;
		protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator2;
		protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator3;
		protected System.Web.UI.WebControls.TextBox TextBoxName;
		protected System.Web.UI.WebControls.TextBox TextBoxState;
		protected System.Web.UI.WebControls.TextBox TextBoxPwd;
		protected System.Web.UI.WebControls.Button ButtonOK;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
		}

		#region Web 窗体设计器生成的代码
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{    
			this.ButtonOK.Click += new System.EventHandler(this.ButtonOK_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void ButtonOK_Click(object sender, System.EventArgs e)
		{
			SqlConnection conn=new SqlConnection(MyClass.ConnString);
			string name=this.TextBoxName.Text.Trim();
			string sqlstr="select * from loginuser where username='"+name+"'";
			SqlCommand comm = new SqlCommand(sqlstr,conn);
			conn.Open();
			SqlDataReader dr=comm.ExecuteReader();
			if(dr.Read()==true)
			{
				dr.Close();
				this.TextBoxState.Text="注册失败：已有该用户名！";
				conn.Close();
			}
			else
			{
				dr.Close();
				sqlstr="insert into loginuser(username,userpwd,sex,logintime) values ('"				+name+"','"+this.TextBoxPwd.Text.Trim()+"','"					+this.RadioButtonList1.SelectedItem.Text+"','"					+DateTime.Now.ToString()+"')";
				comm = new SqlCommand(sqlstr,conn);
				comm.ExecuteNonQuery();	
				conn.Close();
				Session["userName"]=name;
				Response.Redirect("main.aspx");
			}
		}
	}
}